Why can't I refere to another post any more? Copy and past an URL should not be that difficult, even for me

Normally, it does work. Somehow, the link you posted lost the question mark following the PHP script name...

...showthreaded.php?Cat=...

Put the question mark back in, and it works.

Are you using a non-English browser? Maybe the question mark is a different character in your localization.

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Tony Fabris